论文部分内容阅读
本章的主要内容是三角形和多边形有关概念及其边、角的性质,本章的主要知识点如下:1.了解三角形的内角、外角及其主要线段(中线、高、角平分线)等概念.2.会用刻度尺和量角器画出任意三角形的角平分线、中线和高.了解其简单性质.3.了解三角形的稳定性.4.了解几种特殊的三角形与多边形的特征,并能加以简单的识别.5.探索并掌握三角形的内角、外角性质及外角和.
The main contents of this chapter are the related concepts of triangles and polygons and the nature of their edges and corners. The main points in this chapter are as follows: 1. Understand the concepts of interior and exterior corners of triangles and their main line segments (center line, high and angle bisector) .2 Use the scale and protractor to draw the angle bisector, center line, and height of any triangle. Understand its simple properties. 3. Understand the stability of the triangle. 4. Understand some of the special triangle and polygon features and simplify 5. To explore and grasp the triangle’s inner and outer corner of the nature and outer corner and.